Garden Tools

The Best Lawn Mower Gas Caps

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A properly functioning gas cap is crucial for maintaining your lawn mower's performance and preventing fuel evaporation. Without a secure seal, your mower can suffer from reduced efficiency, potential fuel leaks, and even starting issues. Investing in a quality replacement ensures your equipment runs smoothly and safely.

No. 1
594061 Fuel Tank Cap for B&S Toro Craftsman Lawn Mower Gas Tank Caps Replacement
  • 594061 Fuel Tank Cap for B&S Lawn Mower Gas Tank Caps
  • Replacement Fuel Tank Cap
  • If the gas caps become loose due to cracked, worn out, or stripped threads over time, the cap should be replaced. It is recommended that you use this cap with an additional gasket to make the cap fit more snugly.
  • Includes tether to attach the tank cap to engine
No. 2
Lawn Mower Gas Cap Replacement for B&S 675EXi 725EXi Engine Toro Craftsman
  • [COMPATIBLE WITH] Compatible with B&S 675EXi 725EXi Engine, Compatible with Toro Craftsman Lawn Mower
  • [QUALITY ASSURANCE] Compatible with B&S Fuel Tank Cap Replace# 594061, this quality is guaranteed
  • [SMALL AND PORTABLE] Small size, light weight, easy to carry, to prevent your fuel tank cap from encountering accidents
  • [EASY TO INSTALL] Just screw onto the gas tank
No. 3
Fuel Gas Tank Cap Vented for Troy-Bilt 751-0603B 951-3111 for Briggs & Stratton JD MTD Toro Cub Cadet MTD...
  • Please see the details page for specific model information.
  • Brand Compatibility: Compatible with for Husqvarna, for Troy-Bilt, for MTD, for Briggs & Stratton, for Craftsman, for Bobcat, for Cub Cadet, for John Deere, for Toro, for Gravely, for Exmark, for Snapper, for Exmark, and other outdoor power equipment...
  • Correct Size Fit: Inner diameter: 2-1/4 inches. Designed to fit fuel tanks with matching neck dimensions. Measurement confirmation is recommended before ordering.
  • Vented Fuel Cap: Vented structure supports proper fuel system operation on compatible lawn mowers, tractors, and generators.
SaleNo. 4
594061 Gas Cap for B&S Toro 22 Inch Recycler Lawn Mower, Compatible with Craftsman Lawn Mower Gas Tank Caps...
  • 594061 Fuel Tank Cap Compatible Models: Designed to fit B&S Toro 22 inch Recycler Lawn Mowers and Craftsman models M110, M220, and M230 with 140cc and 163cc engines
  • Direct Replacement Part: Functions as a fuel tank cap replacement for worn or damaged original gas caps on compatible lawn mower models
  • Fit: Engineered to provide a tight seal on the fuel tank to prevent gas leaks and minimize fuel evaporation during operation and storage
  • Easy to Install: Simple twist-on design allows for quick and tool-free replacement of your existing gas cap in seconds
No. 5
Lawn Mower Gas Cap Replacement for B&S 550E 550EX 625E 675EX 725EX Engine
  • [COMPATIBLE WITH] Compatible with B&S 550E 550EX 625E 675EX 725EX Series
  • [QUALITY ASSURANCE] Compatible with B&S Fuel Tank Cap Replace# 799585 799684, this quality is guaranteed
  • [SMALL AND PORTABLE] Small size, light weight, easy to carry, to prevent your fuel tank cap from encountering accidents
  • [EASY TO INSTALL] Just screw onto the gas tank
No. 6
Fuel Cap 2-1/4" Gas Cap fit for Club Car Carryall-294 XRT1500 for Ariens Mini-Zoom Sport-Zoom EZR HVZ for John...
  • Manufacturer Part# 01538400 125-384 1015188 1027516-01
  • Fitment:Fits For Following Models:▶for Ariens: Mini Zoom, Sport Zoom, EZR, HVZ ▶for Club Car: Carryall-294 XRT-1500 2004-2006 ▶for Exmark: Viking Explorer Lazer-Z Metro Turf-Ranger Turf-Tracer and 300-series ▶for John Deere: STX thru SRX series...
  • Material & Feature: Fuel Cap is made of premium polyethylene as material. Built-in rubber seal to make sure good seal performance. Easy to install by rotating the thread
  • Package: Fuel Cap x 1
No. 7
Briggs & Stratton Genuine Fuel Tank Cap 596250
  • Genuine Briggs & Stratton Fuel Tank Cap.
  • Fits 450 - 550 Series (models 08P5, 092J, 093J, 09P6 & 09P7).
  • Guaranteed to fit ensuring emissions compliant Briggs & Stratton engine.
  • Manufactured and tested to help deliver optimum performance.
No. 8
594061 Fuel Tank Cap Compatible with B&S Toro Crafts&man Lawn Mower Gas Tank Caps Replacement (replaces...
  • 594061 Fuel Tank Cap for B & S Replacement crafts-man m230 m110 gas cap
  • Replacement to&ro push mower gas cap, to&ro recycler 22 gas cap
  • Compact and portable: small in size, lightweight, and easy to carry, helping prevent accidental damage to the product.
  • Package list: 1 x Fuel Tank Cap 2 x O-Ring Includes tether to attach the tank cap to engine
No. 9
Arnold OEM-751-10300 Genuine Parts Replacement Gas Cap for 4.5-6.5 HP Engines
  • Package Dimensions: 4.95 L x 1.45 H x 6.83 W (inches)
  • Package Weight : 0.2 pounds
  • Country of Origin : China
  • Power source type: gas-powered

Last update on 2026-10-07 / Affiliate links / Images from Amazon Product Advertising API

How to Choose the Best Lawn Mower Gas Caps

Material and Durability

When selecting a gas cap, consider the material it's made from. Most caps are constructed from durable plastic, but the quality can vary. Look for UV-resistant plastics that won't degrade under constant sun exposure. Some caps also feature rubber seals for a tighter fit and better longevity. A well-built cap should withstand regular use and exposure to gasoline and outdoor elements.

Compatibility and Fit

The most critical factor is ensuring the gas cap is compatible with your specific lawn mower model. Mowers use different tank designs and thread patterns, so a universal cap might not fit. Always check the manufacturer's specifications or the cap's product description for a list of compatible brands and models. Some caps are designed with specific tethering mechanisms or vent systems, which should also align with your mower's requirements.

Ventilation Features

Many modern gas caps incorporate a venting system to allow air into the fuel tank as fuel is consumed. This prevents a vacuum from forming, which can cause the engine to stall. Ensure the replacement cap has an appropriate vent if your original cap did, or if your mower requires one. Some caps have non-vented designs for specific applications, so understand your mower's needs before purchasing.

Ease of Installation and Use

A good gas cap should be easy to install and remove, even with gloved hands. Look for caps with a textured grip or a design that allows for a secure hold. If your mower has a tethered cap, ensure the replacement offers a similar convenience to prevent loss. Simple, user-friendly designs contribute to a hassle-free maintenance experience.

Frequently Asked Questions

How do I know which gas cap fits my lawn mower?
Check your lawn mower's owner's manual for the exact part number or specifications of the original gas cap. You can also find compatibility information in the product description of the replacement cap, which often lists compatible mower brands and models.
What's the difference between a vented and non-vented gas cap?
A vented cap allows air into the fuel tank to replace the fuel being used, preventing vacuum lock and ensuring consistent fuel flow. A non-vented cap seals the tank completely, which is suitable for certain fuel systems but can cause issues if not designed for your specific engine.
Can I use a universal gas cap?
While universal caps exist, they may not provide a secure or proper seal for all lawn mower models. It's always best to find a cap specifically designed or listed as compatible with your mower's make and model to ensure optimal performance and prevent leaks.
My old gas cap is cracked, is it important to replace it?
Yes, a cracked gas cap can lead to fuel evaporation, potential fuel leaks, and allow dirt and debris into your fuel tank. This can negatively impact your mower's performance and even cause engine damage over time.
How often should I replace my lawn mower's gas cap?
There's no set schedule for replacing a gas cap; it should be replaced when it shows signs of damage, such as cracks or a loose fit. Regularly inspecting the cap for wear and tear will help you determine when a replacement is necessary.

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